Different types of steroids athletes use

Good evening guys.. i wanna ask something, it’s about model based testing, it’s still blur for me.. what is model based testing.. ok we start with software testing, there is two type of testing which are functional n nonfunctional, functional is black box, white box n grey box.. what about model based testing, where can we categorized it??? if we numbered it, it look like
Software testing
Software testing types
Functional
Black box
etc..
Non Functional
Usability
etc..

Different types of steroids athletes use

different types of steroids athletes use

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